초록 ▼

A method of inserting a liner (10) into a host tubular (60), in which the liner is deformed to reduce its cross-sectional dimensions; the deformed liner is fed into the host tubular in a downstream direction; and a fluid is injected under pressure into the host tubular to urge the liner in the downs

A method of inserting a liner (10) into a host tubular (60), in which the liner is deformed to reduce its cross-sectional dimensions; the deformed liner is fed into the host tubular in a downstream direction; and a fluid is injected under pressure into the host tubular to urge the liner in the downstream direction, while the fluid pressure maintains the deformation of the liner. The liner is advantageously deformed by at least one set of rollers (22, 23, 24) into an unstable cross-sectional shape which has at least three axes of symmetry and which spontaneously expands into contact with the host tubular unless held by the pressure of the injected fluid. The injected fluid applies a shear force to the liner in the downstream direction which is substantially uniform along the length of the liner.

대표청구항 ▼

A method of inserting a liner (10) into a host tubular (60), in which the liner is deformed to reduce its cross-sectional dimensions; the deformed liner is fed into the host tubular in a downstream direction; and a fluid is injected under pressure into the host tubular to urge the liner in the downs

A method of inserting a liner (10) into a host tubular (60), in which the liner is deformed to reduce its cross-sectional dimensions; the deformed liner is fed into the host tubular in a downstream direction; and a fluid is injected under pressure into the host tubular to urge the liner in the downstream direction, while the fluid pressure maintains the deformation of the liner. The liner is advantageously deformed by at least one set of rollers (22, 23, 24) into an unstable cross-sectional shape which has at least three axes of symmetry and which spontaneously expands into contact with the host tubular unless held by the pressure of the injected fluid. The injected fluid applies a shear force to the liner in the downstream direction which is substantially uniform along the length of the liner. urometer. 9. The apparatus of claim 1, wherein the fluid media comprises air. 10. The apparatus of claim 1, wherein the fluid media comprises water. 11. The apparatus of claim 1, further comprising a seal disposed between the inner wall and the outer diameter. 12. A piping apparatus, comprising: an outer body adapted to couple to a conduit, the outer body formed with a substantially cylindrical longitudinal bore defining an inner wall, the longitudinal bore having a seating surface; an inner sleeve adapted to threadedly engage the outer body, the inner sleeve having an outer diameter and formed with a first chamber section that tapers down to a second chamber section, the inner sleeve formed with a radial bore that extends from the outer diameter to the second chamber section, the inner sleeve further formed with a threaded portion on the outer diameter, the threaded portion discontinuous around the outer diameter; a resilient member disposed within the first chamber section, the resilient member having a slit formed therein that is operable to allow a probe to be inserted therethrough when the inner sleeve is threadedly engaged with the outer body and a first end of the inner sleeve is engaged with the seating surface; and wherein the inner sleeve, when threadedly engaged with the outer body, is axially movable with respect to the outer body such that when the first end of the inner sleeve is not engaged with the seating surface a flow passage is produced between the outer diameter and the inner wall, the flow passage operable to allow fluid media to escape from the conduit through the radial bore and out of the second chamber section. 13. The apparatus of claim 12, wherein the inner sleeve is formed with a threaded portion adjacent a second end, the threaded portion operable to couple to a hose. 14. The apparatus of claim 12, wherein the resilient member includes a first portion and a second portion, the first portion having a hardness of between 25 and 45 durometer, the second portion having a hardness of between 60 and 80 durometer. 15. The apparatus of claim 12, wherein the fluid media comprises air. 16. The apparatus of claim 12, wherein the fluid media comprises water. 17. The apparatus of claim 12, further comprising a seal disposed between the inner wall and the outer diameter. 18. The apparatus of claim 12, further comprising an aperture formed in the outer body, the aperture operable to accept a pin element for restricting the axial motion of the inner sleeve. 19. A method of constructing a piping apparatus, comprising: providing an outer body, the outer body adapted to couple to a conduit; forming a substantially cylindrical longitudinal bore in the outer body, the longitudinal bore defining an inner wall, the longitudinal bore having a seating surface; providing an inner sleeve having an outer diameter and formed with an inner chamber; disposing a resilient member within the inner chamber; forming a slit in the resilient member, the slit operable to allow a probe to be inserted therethrough when a first end of the inner sleeve is engaged with the seating surface; and adjustably engaging the inner sleeve with the outer body such that when the first end of the inner sleeve is not engaged with the seating surface a flow passage is produced between the outer diameter and the inner wall, the flow passage operable to allow fluid media to escape from the conduits. 20. The method of claim 19, further comprising: forming the inner chamber with a first chamber section that tapers down to a second chamber section; and disposing the resilient member within the first chamber section. 21. The method of claim 19, further comprising coupling the flow passage to the second chamber section with a radial bore, whereby the flow passage is operable to allow fluid media to escape from the conduit through the radial bore and out of the second chamber section. 22. The method of claim 21, further comprising providi